Dr. John M. O'Day, MD
- Medicare services, 2023
- 90
- Part D claims, 2024
- 28
- Industry payments
- $106
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 361 High St, Somersworth, NH 03878-1407
- Practice phone
- Call (603) 692-4500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Wentworth Douglass Physician - ENT & Audiology - Somersworth (High St)
Multi-specialty group site · Somersworth, New Hampshire
Find Dr. O'Day's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John M. O'Day is an otolaryngologist in Somersworth, New Hampshire
Dr. O'Day practices at Wentworth Douglass Physician - ENT & Audiology - Somersworth (High St) in Somersworth, New Hampshire.
Dr. O'Day's NPI, 1508880964, was assigned on July 27, 2006. Dr. O'Day graduated from University of Maryland School of Medicine in 1972. Dr. O'Day holds New Hampshire license 5507.
- NPI
- 1508880964NPI Registry (opens in a new tab)
- NPI enumeration date
- July 27, 2006
- NPI status
- Active
- Practice phone
- (603) 692-4500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 80
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John M. O'Day practices at Wentworth Douglass Physician - ENT & Audiology - Somersworth (High St) in Somersworth, New Hampshire
Dr. O'Day's primary practice is Wentworth Douglass Physician - ENT & Audiology - Somersworth (High St), at 361 High St, Somersworth, NH 03878-1407. The practice phone is (603) 692-4500.
- Wentworth Douglass Physician - ENT & Audiology - Somersworth (High St)361 High St, Somersworth, NH 03878-1407Phone(603) 692-4500
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John M. O'Day is affiliated with 2 sites of care and 2 medical groups
Dr. O'Day's primary practice is Wentworth Douglass Physician - ENT & Audiology - Somersworth (High St) in Somersworth, New Hampshire. The medical group on file is Wentworth-Douglass Hospital. Dmand AI also links Dr. O'Day to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. John M. O'Day's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Day practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Wentworth Douglass Physician - ENT & Audiology - Somersworth (High St) | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John M. O'Day is one of 42 otolaryngologists in New Hampshire
Otolaryngology is Dr. O'Day's primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dr. O'Day is licensed in New Hampshire.
Specialties and state licenses
- Otolaryngology, New HampshirePrimary
Otolaryngologists near Dr. O'Day
Counts of otolaryngologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John M. O'Day billed Medicare for 90 services in 2023
CMS data shows 90 Medicare services from Dr. O'Day across 1 procedure code in 2023, all of them office visits. Medicare paid $5,047 for them. Every service was in an office.
Dr. O'Day's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 2672023: 9066%
- Surgery
- 2022: 482023: 0100%
Dr. O'Day compared with the New Hampshire median for otolaryngologists, 2023
- Dr. O'Day
- New Hampshire median
- Medicare services
- 90vs 49482% below
- Part D claims
- 12vs 15392% below
Medians across 40 otolaryngologists in New Hampshire with Dmand AI profiles that report each measure.
Dr. O'Day's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. O'Day and other otolaryngologists in New Hampshire.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John M. O'Day's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. O'Day's median patient age at 63, with 52% women.
Dr. O'Day's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women52%
- Men48%
Source: Dmand AI Patient Panel Data
Dr. John M. O'Day wrote 28 Medicare Part D claims in 2024
In 2024, Dr. O'Day wrote 28 Medicare Part D claims. 93% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $319 in total drug cost. In 2022, CMS named 47 claims across 3 drugs.
Dr. O'Day's Part D claims by kind of drug, 2024
- Generic26 claims93%
- Brand-name and other2 claims7%
Dr. O'Day's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 472023: 1274%
Drugs named by CMS: 1 in 2023, 3 in 2022.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. John M. O'Day received $106 in industry payments from 2016 to 2021
CMS Open Payments shows 3 general payments to Dr. O'Day from 2 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 100% of the total. Intersect ENT, Inc. paid the most, $69.
General payments to Dr. O'Day by program year, 2016 to 2021
Companies that paid Dr. O'Day the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John M. O'Day graduated from University of Maryland School of Medicine
Dr. O'Day graduated from University of Maryland School of Medicine in 1972.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John M. O'Day's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John M. O'Day
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John M. O'Day's NPI number?
Dr. John M. O'Day's NPI number is 1508880964. It was assigned on July 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John M. O'Day?
Dr. John M. O'Day is an otolaryngologist in Somersworth, New Hampshire. The primary specialty in the NPI Registry is Otolaryngology Physician (taxonomy code 207Y00000X).
Where does Dr. John M. O'Day practice?
Dr. O'Day practices at 361 High St, Somersworth, NH 03878-1407. Dr. O'Day's primary practice is Wentworth Douglass Physician - ENT & Audiology - Somersworth (High St) in Somersworth, New Hampshire. Dmand AI also links Dr. O'Day to 1 group practice or clinic and 1 medical group.
What is Dr. John M. O'Day's office phone number?
The practice phone on file for Dr. O'Day is (603) 692-4500.
What is Dr. John M. O'Day's medical license number?
Dr. O'Day holds New Hampshire license 5507.
What medical group is Dr. John M. O'Day part of?
Dr. O'Day is linked to Wentworth-Douglass Hospital. Dmand AI links Dr. O'Day to 1 more medical group.
Does Dr. John M. O'Day accept Medicare?
Yes. CMS data shows Dr. O'Day billed Medicare for 90 services in 2023.
What services does Dr. John M. O'Day bill to Medicare?
In 2023, Dr. O'Day's most billed Medicare services were office visit, established patient (99213).
Where did Dr. John M. O'Day go to medical school?
Dr. O'Day graduated from University of Maryland School of Medicine in 1972.
What drugs does Dr. John M. O'Day prescribe most?
In 2023 Medicare Part D data, Dr. O'Day's most prescribed drugs by claims were Amoxicillin-Clavulanate Potass.
Has Dr. John M. O'Day received payments from drug or device companies?
CMS Open Payments shows $106 in general payments to Dr. O'Day from 2 companies from 2016 to 2021. The largest total came from Intersect ENT, Inc.
How long has Dr. John M. O'Day been practicing?
Dr. O'Day graduated from medical school in 1972, 54 years ago.
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